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A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day. She obtained a small sample of 18 people and found the sample mean was 92.5 minutes with a sample standard deviation of 15.3. Find the margin of error for the 99% Confidence Interval for the population mean.
Should Katie conduct a between-subject ANOVA or a within-subject ANOVA? Describe your answer.
By using the 0.10 level of significance, is there evidence that the population mean is above the $300?
A recent census of a small town in Michigan showed that 60% of the residents are male, 20% have college degrees, and 15% are both male and college graduates.
Where should the warranty limits be set so that only 10% of the TVs need repairs at the manufacturer's expense?
How many subjects would you approximately need to reduce the length of the 95% confidence interval to 2 units?
The variance of the return per share is 4 for stock 1 and 100 for stock 2. The covariance of the return between the two stocks is 5 per share. Use the total variance of the investment as investment risk.
Using a 5% level of significance, is there any difference in proportion of guests who would select the two resorts? What is your conclusion?
How much time should the employer allow employees to finish the job? (Round up to the nearest minute).
What should the cut-off score be for the interviews? (Round to nearest whole number).
What is the probability that the debt for a borrower with good credit is more than $18,000?
They found that those with higher levels of cigarette use had lower GPAs, and vice versa. What can you rightfully conclude from this? Why? Be specific about what this kind of information may indicate and mean.
Illustrate is the range of values for a coefficient of correlation. Illustrate degree of relationship do values of the correlation coefficient (r)with magnitudes close to 1.00 indicate.
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